Oxit axit là nhưng oxit gì
Answers
Answer:
Là những oxit tác dụng với bazo để tạo ra muối và nước, phản ứng với nước tạo thành một axit.
Những oxit axit thường gặp: CO2, SO2, SO3, P2O5, Mn2O7.
Related Questions
What does weight measure?
A: Quantity of matter in an object
B: How much space an object takes up
C: Force of gravity acting on an object
D: How long it takes for an event to occur
Answers
Select the curve that is produced by adding hydrochloric acid to 25 cm3 of sodium hydroxide.A,B,C or D
Answers
B
The sodium hydroxide (NaOH) solution is a basic solution, so the pH of that solution should be close to 14
then when adding hydrochloric acid (HCl) we start to neutralice the solution, meaning the pH must sift slowly to lower pH.
Assuming both solutions have similar concentration the pH shall shift form basic (above 7) to acid pH (below 7). Until now both B and D images agreed with the explanation given. To chose between them we need to remember that HCl is a very strong acid, which means that in solution will get to very acid solutions (very low pH values) which leaves only B as possible answer
describes any element that can exhibit more than one structural form in the same state - solid, liquid, or gas.
Answers
An element that can exhibit more than one structural form in the same state is called an allotrope.
Are there any industrial or technological applications that utilize this property of an element?Yes, there are industrial and technological applications that utilize the property of elements that can exhibit more than one structural form in the same state. For example, carbon exists in multiple structural forms such as graphite and diamond. In industry, graphite is used in lubricants, batteries, and as a refractory material, while diamond is used for cutting and polishing due to its extreme hardness. Additionally, this property of an element is also utilized in technologies such as semiconductors and in the production of advanced materials such as aerospace composites.
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name the elements that determine the weather of a place....
Answers
A 20. 00-ml sample of 0. 3000 m hbr is titrated with 0. 15 m naoh. what is the ph of the solution after 40. 3 ml of naoh have been added to the acid?
Answers
The pH of the solution after 40.3 mL of NaOH have been added to the acid is 1.09. The pH of a solution can be determined using the equation pH = -log[H+].
First, calculate the moles of HBr in the 20.00 mL sample using the formula moles = concentration x volume. Moles of HBr = 0.3000 mol/L x 0.02000 L = 0.00600 mol Moles of NaOH = 0.15 mol/L x 0.0403 L = 0.006045 mol .
Concentration of H+ ions = 0.006045 mol/ (0.02000 L + 0.0403 L) = 0.0814 M. Thus, pH = -log(0.0814) = 1.09. Therefore, the pH of the solution after 40.3 mL of NaOH have been added to the acid is 1.09.
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Question 2 of 30
A television commercial shows happy people while describing some medical
symptoms. These symptoms include feeling tired and sad. The medication
being advertised by the commercial was approved by the FDA to treat a
disease that causes these symptoms. The narrator says that it is available by
prescription only and contains 1% of the active ingredient. What can you infer
about this medication?
OA. The people in the commercial are happy because they were
treated by the medication.
B. The medication would be more effective if it contained 10% of the
active ingredient.
C. Anyone who has the symptoms should request a prescription
from his or her doctor.
D. The medication can treat people who have the disease described.
Answers
The medication can treat people who have the disease described. According to the commercial, the drug has FDA approval to treat a condition whose symptoms are listed.
Additionally, the narrator notes that the medication only comes with a prescription and has 1% of the active substance. We can deduce from this information that the drug can effectively treat persons who have the condition generating these symptoms, but obtaining it requires a prescription. The commercial provides no support for the other possibilities.
Therefore, the correct option is D.
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Ice at 0.0°C is mixed with 7.30 × 10^2 mL of water at 25.0°C. How much ice must melt to lower the water temperature to 0.0°C? The specific heat capacity of water is 4.186 J/(g·K). Latent heat of fusion for water is 333.7 J/g.
Answers
Approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.
To solve this problem, we need to calculate the amount of heat that needs to be transferred from the water to the ice in order to lower the water temperature to 0.0°C.
First, let's calculate the initial heat content of the water. The specific heat capacity of water is 4.186 J/(g·K), and the mass of the water can be calculated using its density (1 g/mL) and volume (7.30 × 10^2 mL):
Mass of water = density × volume = 1 g/mL × 7.30 × 10^2 mL = 7.30 × 10^2 g
The initial heat content of the water can be calculated using the formula:
Heat content = mass × specific heat capacity × temperature change
Heat content = 7.30 × 10^2 g × 4.186 J/(g·K) × (25.0°C - 0.0°C) = 7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C
Next, we need to calculate the amount of heat that needs to be transferred from the water to the ice to lower the water temperature to 0.0°C. This heat transfer occurs during the melting of the ice.
The amount of heat required to melt the ice can be calculated using the formula:
Heat = mass of ice melted × latent heat of fusion
Let's assume that x grams of ice melts. The mass of the ice can be calculated using its density (0.92 g/mL) and volume (same as the volume of water):
Mass of ice = density × volume = 0.92 g/mL × 7.30 × 10^2 mL = 6.716 × 10^2 g
Heat = x g × 333.7 J/g
Now, we need to ensure that the heat transferred from the water to the ice is enough to lower the water temperature to 0.0°C. The heat transferred from the water to the ice is equal to the heat transferred from the water when its temperature drops to 0.0°C:
Heat content of water = Heat transferred to ice
7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C = x g × 333.7 J/g
Now, we can solve for x:
x = (7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C) / (333.7 J/g)
x ≈ 35.90 g
Therefore, approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.
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word equation for magnesium carbonate and nitrate (V)acid.
Answers
Answer:
This is an acid-base reaction (neutralization): MgCO 3 is a base, HNO 3 is an acid.
Explanation:
HNO3 + MgCO3 → H2O + CO2 + Mg(NO3)2
How many hydrogens are in 4H207?
Answers
Hope that helped
It’s 8 because you mulitiply 4x2 so if you had to do oxide(oxygen) it would be 4x7 cuss you multiply the number added before H2O7 and the small numbers already there (deside it) is multiplied
Hope this helps you
Help, please
Whoever gets it correct will get the brainiest.
Answers
Answer:
C
Explanation:
When a chemical system is at equilibrium, the concentrations of the reactants are equal to:___________.
1. the concentrations of the products.
2. the concentrations of the reactants and products have reached constant values.
3. the forward and reverse reactions have stopped. the reaction quotient, , has reached a maximum.
4. the reaction quotient, , has reached a minimum.
Answers
Answer:
catalyst
Explanation:
answer the question.........
mb wrg subject but its biology
Answers
The description of nonpoint source pollution is dirty drainage from city roadways.
The correct option is A.
What is pollution?Pollution describes the presence of substances in the environment that are harmful to the living organisms present in that environment.
Pollution may be classified based on the source of the pollution into:
point source pollution - point source pollution refers to pollution whose origin or source point is easily identifiable such as sewage from homes and industries or smoke from industriesnon-point source pollution - non-point source pollution refers to pollution whose source point is not easily identifiable, rather, it occurs as a result of the runoff or water snow that then carries pollutants from various sources as they flow. For example, after a flood, the flood water carries several pollutants with it as it flows over drainages and the ground.Learn more about nonpoint source pollution at: https://brainly.com/question/1557306
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2. Which of the following is classified as a thermal conductor? a) Wool b) Copper c) Air d) Plastic 3. Fill in the blanks below to describe the Fehrenheit and Celsius scales. Celsius scale Boiling point of pure water: Freezing point of pure water: Fahrenheit scale Boiling point of pure water: Freezing point of pure water:
Answers
Among the options provided, the thermal conductor is b) Copper. In Celsius scale, Boiling point of pure water is 100 degrees Celsius, Freezing point of pure water: 0 degrees Celsius . In Fahrenheit scale, Boiling point of pure water is 212 degrees Fahrenheit and Freezing point of pure water is 32 degrees Fahrenheit
Thermal conductivity refers to the ability of a material to conduct heat. Copper is known for its high thermal conductivity, making it an excellent conductor of heat. It is widely used in various applications where efficient heat transfer is desired, such as in electrical wiring, heat exchangers, and cookware. Hence option b)Copper is the correct answer. The Celsius scale, also known as the centigrade scale, is a temperature scale commonly used in most parts of the world. The boiling point of pure water on the Celsius scale is 100 degrees Celsius, while the freezing point of pure water is 0 degrees Celsius. The Fahrenheit scale is mainly used in the United States and a few other countries. The boiling point of pure water on the Fahrenheit scale is 212 degrees Fahrenheit, and the freezing point of pure water is 32 degrees Fahrenheit.
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Gold, which has a density of 19.32 g/cm³, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold, with a mass of 8.489 g, is pressed into a leaf of 5.966 μm thickness, what is the area of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 μm, what is the length of the fiber?
Answers
(a) When the density of gold is 19.32 g/\(cm^{3}\) than area of the gold leaf is approximately 0.4386 cm².
(b) The length of the gold fiber is given by h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).
To solve these problems, we can use the formula for the volume of a shape and the given density of gold.
(a) To find the area of the leaf, we can use the formula for the volume of a rectangular shape: V = A * h, where V is the volume, A is the area, and h is the thickness.
Given the mass of gold (m = 8.489 g) and density (ρ = 19.32 g/cm³), we can find the volume: V = m / ρ.
Substituting the values, we have V = 8.489 g / 19.32 g/cm³ = 0.4386 cm³.
Since the leaf is pressed into a thin shape, we can assume it has a rectangular shape, and the volume is approximately equal to the area: A ≈ V = 0.4386 cm².
(b) To find the length of the fiber, we can use the formula for the volume of a cylindrical shape: V = π * r² * h, where V is the volume, r is the radius, and h is the length.
Given the mass of gold (m = 8.489 g) and density (ρ = 19.32 g/cm³), we can find the volume: V = m / ρ.
Substituting the values, we have V = 8.489 g / 19.32 g/cm³ = 0.4386 cm³.
The volume of a cylinder is also equal to the product of the cross-sectional area (π * r²) and the length (h), so we have: π * r² * h = 0.4386 cm³.
Substituting the radius (r = 2.500 μm = 2.500 × 10⁻⁴ cm), we can solve for the length: h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).
To summarize:
(a) The area of the gold leaf is approximately 0.4386 cm².
(b) The length of the gold fiber is given by h = 0.4386 cm³ / (π * (2.500 × 10⁻⁴ cm)²).
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Can somebody plz answer both questions correct!!!! Only 1-2 sentences per question is fine :)
(WILL MARK BRAINLIEST)...promise :D
Answers
Answer:
1) A compound is the chemical combination of two or more elements into a single substance.
An atom is the smallest particle of an element.
2) Elements have only one kind of atom.
Compound always have more than one kind of atom.
Answer:
1) An atom is the smallest possible piece of a chemical element, and a compound can be composed of two or more separate elements
2) An element is made up of only one kind of atom and a compound is made up of two or more kind of atoms
Explanation:
The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 1.96 g of water boils at atmospheric pressure
Answers
The heat absorbed when 1.96 g of water boils at atmospheric pressure is 31.4 kJ. Heat of vaporization is the amount of heat required to change one mole of a substance from liquid to gaseous state at a particular pressure and temperature.
The heat of vaporization of water is 40.66 kJ/mol. Thus, it is the amount of heat absorbed when one mole of water is vaporized. To determine the heat absorbed when 1.96 g of water boils at atmospheric pressure, we need to first calculate the number of moles of water:
Mass of water
= 1.96 g
Molar mass of water
= 18.01528 g/mol
Number of moles of water
= (1.96 g) / (18.01528 g/mol)
= 0.1088 mol
The amount of heat absorbed when 0.1088 mol of water vaporizes can be calculated as follows:
Heat absorbed
= (40.66 kJ/mol) × (0.1088 mol)
= 4.42 kJ
However, we need to convert this value to heat absorbed when 1.96 g of water vaporizes:
Heat absorbed when 1 mol of water vaporizes
= 40.66 kJ/mol
Mass of 1 mol of water
= 18.01528 g
Heat absorbed when 18.01528 g of water vaporizes
= 40.66 kJ
Heat absorbed when 1 g of water vaporizes
= (40.66 kJ) / (18.01528 g)
= 2.25 kJ
Heat absorbed when 1.96 g of water vaporizes
= (2.25 kJ/g) × (1.96 g)
= 4.41 kJ
Therefore, the heat absorbed when 1.96 g of water boils at atmospheric pressure is 4.41 kJ.
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What is the name of NaC2H3O2?
Answers
The chemical name for NaC₂H₃O₂ is sodium acetate.
Sodium acetate is a compound that consists of sodium ions (Na+) and acetate ions. It is also known by its chemical formula CH₃COONa. The compound is commonly found in both solid and aqueous forms.
Sodium acetate is produced by the neutralization reaction between acetic acid and sodium hydroxide. It can also be obtained by reacting sodium carbonate with acetic acid. The resulting product is a white crystalline solid that is highly soluble in water.
One of the notable properties of sodium acetate is its ability to act as a buffer solution, meaning it can resist changes in pH. It is often used in various applications.
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Please help me with 1 2 3 4
Answers
Answer:
ndndjdjndnd d
hbbg
Explanation:
though inc in djdjdbsuhwnwjsh72919th woop ow all all pa workbook ksdj
What will the pressure be if 89.9 moles of argon are contained in a 12.0 L cylinder that is pressurized at a temperature of 300 K?
Answers
Done!
WILL GIVE 50 POINTS AND BRAINLIEST!!!!!
Co^3+ and BrO^- what is the empirical formula and name? K^+ and C2H3O2^- what is the empirical formula and name of compound?
Answers
formula : Co(BrO)3
2. name: potassium acetate
formula: KC2H3O2
Which of the following are examples of chemical changes? Select all that apply.
Water evaporating
Firecrackers exploding
Milk spoiling
Paper tearing
Answers
A B and C are all chemical changes. paper tearing is not.
in chromatography, components of a mixture spend some time absorbed in a stationary phase and some time dissolved in a mobile phase. in terms of intermolecular forces and polarity of the molecules, explain how the components can be separated with these two phases
Answers
The two separate "phases" that make up chromatography are the mobile phase, which is the solvent that passes through the paper transporting various compounds, and the stationary phase. The stationary phase does not pass through the paper; it is contained there.
What is a chromatography?Chromatography is a technique for separating the components of a mixture. To begin the process, the mixture is dissolved in a substance known as the mobile phase, which then carries it through a substance known as the stationary phase. Chemical analysis uses chromatography, a laboratory technique, to separate a mixture into its component parts. The stationary phase is a material that is fixed in a system, and the mobile phase, which is a liquid solvent, dissolves the mixture and carries it through that system.
Why is chromatography important?Chromatography is the most used separation process in chemical laboratories where it is used for analysis, isolation, and purification. It is frequently used in both small- and large-scale production in the chemical process sector.
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THIS IS FOR SCIENCE PLS HELP ME WRITE MY PROMPT How does the human population and human activity affect Earth?
Answers
Which of the following reagents will best convert nitrobenzene into 2,4,6−trichlorobromobenzene?
A) SnCl2/HCl, Cl2(aq), NaNO2/HCL-0C, CuBr
B) Cl2/AlCl3, SnCl2/HCl, NaNO2/HCl - 0, CuBr
C) SnCl2/HCl, Br2 - H2O NaNO2/HCl - 0C CuCl
D) SnCl2/ HCl, NaNO2/ HCl - 0 C, H2O, Cl2 (aq) HBr
Answers
Nitrobenzene is first diminished with tin(II) chloride and HCl to shape aniline. Then, at that point, aniline is chlorinated with watery chlorine to shape 2,4,6-trichlorosilane. The correct answer is (A).
It is then diazotized with sodium nitrite and HCl. At long last, cuprous bromide is utilized to supplant the diazonium bunch with the Bromo gathering to acquire 1-bromo-2,4,6-trichlorobenzene.
By blending benzene in with nitric corrosive within the sight of sulfuric corrosive, we can change over benzene into nitrobenzene.
Aniline goes through nucleophilic replacement with bromine, even in cold. The bromine molecules enter at the two ortho positions and the para position with the arrangement of 2,4,6-tribromoaniline.
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1. Intermolecular forces do not have any effect on determining the physical properties of substances such as surface tension and melting point.
a. TRUE
b. FALSE
2. The solids and liquids with the strongest intermolecular forces of attraction will have the lowest melting and boiling points.
a. TRUE
b. FALSE
3. In carbon dioxide, London dispersion forces are the only intermolecular forces of attraction.
a. TRUE
b. FALSE
4. Intermolecular hydrogen bonding plays an important role in the structure of polymers.
a. TRUE
b. FALSE
5. The intermolecular forces of attraction in hydrogen gas are stronger than those of helium gas.
a. TRUE
b. FALSE
6. At room temperature and 1 atm, covalent crystals are solid.
a. True
b. False
7. Intermolecular forces hold the oxygen and hydrogen atoms together in a water molecule.
a. TRUE
b. FALSE
8. In a diamond, each carbon atom is covalently bonded to four other carbons in a _____.
a. Polyhedron
b. Hexagon
c. Pentagon
d. Tetrahedron
9. As the temperature increases, the molecular motion of the molecules decreases and it becomes difficult to overcome the polar attractions.
a. TRUE
b. FALSE
10. Intermolecular forces can exist between:
a. Atoms
b. Molecules
c. Ions
d. All of the above
Answers
Answer:
1)false
2) false
3)True
4)True
5) false
6)false
7) true
8) d
9)false
10) b
The correct options for the following 10 statements will be 1. false 2. false 3. true 4. true 5. true 6. true 7. true 8. option C is correct 9. false 10. Option D is correct.
What are intermolecular forces?The force of attraction between molecules is said to be intermolecular force the strongest intermolecular forces of attraction will have the highest melting and boiling points.
Intermolecular forces effects on determine the physical properties of substances such as surface tension and melting point. Intermolecular hydrogen bonding plays an important role in the structure of polymers.
Therefore, the correct options for the following 10 statements will be 1. false 2. false 3. true 4. true 5. true 6. true 7. true 8. option C is correct 9. false 10. Option D is correct.
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b) A long glass tube is set up as shown. cotton wool soaked in concentrated hydrochloric acid long glass tube damp blue itmus paper At first, the blue litmus paper does not turn red After a short time, the litmus paper turns red. Explain these observations using the kinetic particle model
Answers
The litmus paper does not turn red until the acid particles begin to move in the litmus paper then it turns red.
Why does the blue litmus turn red?We know that one of the properties of an acid is that an acid is able to turn blue litmus to red. This is the result of a reaction that tables place between the acid and the litmus paper.
Now, we know that the particles that compose matter are in constant random motion according to the kinetic particle model. Thus, when the cotton wool soaked in concentrated hydrochloric acid is introduced to the litmus paper, it does not turn red until the acid particles begin to move in the litmus paper then it turns red.
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which of the following choices are the characteristics of life
Answers
A 9.583 L contains nitrogen gas under a pressure of 4.972 atm at
31.8°C. Calculate the number of moles of nitrogen in the tank.
Answers
Answer:
0.0188
Explanation:
using pv=nRt
where v--volume
p pressure
n number of moles
t temperature in kelvin
R molar gas constant=8.314atmmoldm^-3k^-1
4.972 × 9.583 =n × 8.314 × (31.8 + 273)
note I changed 31.8c to kelvin
making n subject of the formula
n=(4.972 × 9.583)/(8.314 ×(31.8 + 273)
n=(4.972 × 9.583)/(8.314 ×(304.8))
n=0.0188 moles
Please answer ALL parts of the question for a thumbs up.
Thank you!
1.
A)
Draw the following (in any format) and write the molecular
formula:
A) 3-iodo-2-methylhexane
B) 1,2-dichloroethane
C) 2-chloro
Answers
The given compounds are 3-iodo-2-methylhexane and 1,2-dichloroethane. Their molecular formulae are C7H15I and C2H4Cl2 respectively. "2-chloro" does not specify a complete compound, so the molecular formula cannot be determined.
A) 3-iodo-2-methylhexane is a compound with six carbon atoms (hexane) and a methyl group (CH3) attached to the second carbon atom. Additionally, there is an iodine atom (I) attached to the third carbon atom. The molecular formula of this compound is C7H15I. Image 2 depicts 3-iodo-2-methylhexane.
B) 1,2-dichloroethane consists of two carbon atoms (ethane) with chlorine atoms (Cl) attached to the first and second carbon atoms. The molecular formula of this compound is C2H4Cl2. Image 1 depicts 1,2-dichloroethane. C) The term "2-chloro" indicates that there is a chlorine atom attached to the second carbon atom of an unknown compound. However, without additional information about the remaining atoms and their arrangement, the complete molecular formula cannot be determined.
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how many grams of manganese(III)
oxide would be produced from the
complete reaction of 46.8 g of zinc?
Answers
Answer:113
Explanation:let me know if it is right
According to stoichiometry and reaction which produces manganese(III) oxide 134.24 g would be produced from the complete chemical reaction of 46.8 g of manganese.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
According to the chemical reaction,of oxidation of manganese and as per stoichiometry,54.93 g manganese produces 157.87 g manganese(III) oxide so ,46.8 g of manganese will produce 46.8×157.87/54.93=134.24 g.
Thus, 134.24 g of manganese(III) oxide would be produced from the complete reaction of 46.8 g of manganese.
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